Fix toolsets in .sourcekit-lsp/config.json, drop popcount C code

Author: kubamracek

stm32-lvgl/.sourcekit-lsp/config.json

@@ -2,13 +2,10 @@
   "swiftPM": {
     "configuration": "release",
     "triple": "armv7em-none-none-eabi",
-
-    "__comment": "XXX SourceKit-LSP seems to ignore the toolset (relative or absolute path)...",
-    "toolset": ".../toolset.json",
-
+    "toolsets": ["toolset.json"],
     "swiftCompilerFlags": [
       "-enable-experimental-feature", "Embedded",
-      "-enable-experimental-feature", "Extern",
+      "-enable-experimental-feature", "Extern"
     ]
   }
 }

stm32-lvgl/Sources/Application/Clocks.swift

@@ -273,6 +273,13 @@ extension UInt64 {
   }
 }
 
+func log2_exact(_ val: UInt32) -> UInt32 {
+  guard val.nonzeroBitCount == 1 else {
+    preconditionFailure("Value \(val) is not a power of 2")
+  }
+  return UInt32(val.trailingZeroBitCount)
+}
+
 extension Main {
   static func setPrescalers(_ prescalers: (hpre: UInt32, ppre1: UInt32, ppre2: UInt32)) {
     let log2_ahb: UInt32 = log2_exact(prescalers.hpre)

stm32-lvgl/Sources/Support/include/Support.h

@@ -41,12 +41,3 @@ static inline void delay(uint32_t i) {
     : "cc"
         );
 }
-
-void panic(const char *);
-
-static uint32_t log2_exact(uint32_t value) {
-    if ((value == 0) || (__builtin_popcount(value) != 1)) {
-        panic("log2_exact");
-    }
-    return 31U - __builtin_clz(value);
-}